import java.util.Scanner;
// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main
{
 public static void main(String[] args) 
 {
	 Scanner in = new Scanner(System.in);
	 double a = in.nextDouble();
	 char b = in.next().charAt(0);
	 int ret = 0;
	 if(a <= 1)
	 {
	 	ret = 20;
	 }
	 else
	 {
	 	ret = 20 + (int)Math.ceil(a - 1);
	 }
	 if(b == 'y') ret += 5;
	 	System.out.println(ret);
 }
}
